Laser Ablation of Polypropylene Films using Nanosecond, Picosecond, and Femtosecond Laser

Sohn, Ik-Bu; Noh, Young‐Chul; Kim, Youngseop; Ko, Do‐Kyeong; Lee, Jongmin; Choi, Youngjin

doi:10.3807/josk.2008.12.1.038

Cited by 18 publications

(10 citation statements)

References 11 publications

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“…However, most previous researches for the process are based on the experimental approach rather than using numerical simulation [5][6][7][8]. Although a few papers that perform experimental research and numerical analysis simultaneously can be found [9][10][11], those papers are restricted to suggest limited prediction on the laser ablation or deposition result because it is hard to consider many essential parameters based on experimental results.…”

Section: Introductionmentioning

confidence: 99%

FEM based simulation of the pulsed laser ablation process in nanosecond fields

Lim

Yoo

2011

J Mech Sci Technol

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For the pulsed laser ablation in nanosecond fields, the key physical phenomenon of the removing process is thermal evaporation. For the process optimization of the nano-second laser ablation, it is essential to set up effective simulation that can reflect material absorption coefficient, energy intensity of laser, laser pulse shape, and so forth. In this research, material ablation in nano-second region is simulated by using a finite element method (FEM) commercial package and its result has been compared with experiment results focused on the difference in the ablation depth and its shape occurred after each laser pulse hitting. Finally, the effect of the parameter variation on the ablation process has been verified.

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Section: Introductionmentioning

confidence: 99%

FEM based simulation of the pulsed laser ablation process in nanosecond fields

Lim

Yoo

2011

J Mech Sci Technol

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“…Laser micromachining is a powerful method for surface patterning and structuring of materials [1]. In recent years, microfabrication with femtosecond laser pulses has attracted many researchers' attention.…”

Section: Introductionmentioning

confidence: 99%

Microstructuring of Optical Fibers Using a Femtosecond Laser

Sohn¹,

Kim²,

Noh³

et al. 2009

Journal of the Optical Society of Korea

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Laser ablation with femtosecond lasers is highly promising for microfabrication of materials. Also, the high peak power of femtosecond lasers could induce a multiphoton absorption to ablate transparent materials. Similar results have also been were obtained in the case of optical fibers. In this paper, we present our experimental results of femtosecond laser microstructuring of optical fiber and its applications to microelectronic components and fiber optic devices. Finally, we directly produced micro holes with femtosecond laser pulses in a single step by moving an optical fiber in a preprogrammed structure. When water was introduced into a hole drilled from the bottom surface of the optical fiber, the effects of blocking and redeposition of ablated material were greatly reduced and the aspect ratio of the depth of the hole was increased. We have presented circular and rectangular-shaped holes in optical fiber.

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“…[1][2][3][4] The laser ablation process is applicable to various materials, environment-friendly, and simpler than a photolithography process. Because the laser ablation process is non-contacting, it is less influenced by thermal impact and produces less thermal and mechanical deformation.…”

Section: Introductionmentioning

confidence: 99%

Four-beam Interference Optical System for Laser Micro- structuring Using Picosecond Laser

Noh¹,

Lee²,

Shin³

et al. 2009

Journal of the Optical Society of Korea

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A four beam interference optical system for laser micro structuring using a pulse laser was demonstrated. The four beam interference optical system using a pulse laser(picosecond laser) can fabricate micro structure on mold material(NAK80) directly. Micro structure on the polymer can be reproduced economically by injection molding of the micro structure on the mold material. The four beam interference optical system was composed by the DOE(Diffractive Optical Element) and two lenses. The laser intensity distribution of four beam interference was explained by an interference optics point of view and by the image optics point of view. We revealed that both views showed the same result. The laser power distribution of a 1 μm peak pattern was made by the four beam interference optical system and measured by the objective lens and CCD. A 1 μm pitch dot pattern on the mold material was fabricated and measured by SEM(Scanning Electron Microscopy).

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Laser Ablation of Polypropylene Films using Nanosecond, Picosecond, and Femtosecond Laser

Cited by 18 publications

References 11 publications

FEM based simulation of the pulsed laser ablation process in nanosecond fields

FEM based simulation of the pulsed laser ablation process in nanosecond fields

Microstructuring of Optical Fibers Using a Femtosecond Laser

Four-beam Interference Optical System for Laser Micro- structuring Using Picosecond Laser

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